Quantum Test of the Local Position Invariance with Internal Clock Interferometry

• URL: http://arxiv.org/abs/2301.11258v1
• Date: Thu, 26 Jan 2023 17:49:07 GMT
• Title: Quantum Test of the Local Position Invariance with Internal Clock Interferometry
• Authors: Zhifan Zhou
• Abstract summary: Current attempts to test local position invariance (LPI) compare different clock transition rates with classically exchanged signals. We propose an experimental scheme for the quantum test of LPI: an internal atomic clock interferometer comprising two interfering clocks within one atom.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Current attempts to test local position invariance (LPI) compare different clock transition rates with classically exchanged signals. We propose an experimental scheme for the quantum test of LPI: an internal atomic clock interferometer comprising two interfering clocks within one atom. We prepare the atom in a superposition of two clock states and one ground state, which evolves coherently along two quantum clock oscillations into stable internal Ramsey interference patterns. The interference pattern with the shared ground state shows a visibility modulation, which can be interpreted as the beating of the individual clock oscillations and a direct consequence of complementarity. Upon the interferometer experiencing a different gravitational potential, LPI predicts that both clock tick rates will change proportionally, while quantum complementarity indicates that the visibility modulation should modify accordingly. This change is deemed insignificant for the first period of visibility modulation but can be stacked up until the limit of the system coherence time. Since no splitting or recombining is involved, the system coherence time can be as long as the trap lifetime or the clock state lifetime. The required resolution to observe the visibility modulation is within reach of the state-of-art optical clocks' sensitivities. This experimental scheme is feasible in different scenarios, still or with speed, and may shed new light on studying the quantum effect of time and general relativity.

Related papers

• Atomic clock interferometry using optical tweezers [0.0]
  We propose using optical tweezers to implement clock interferometry. Our proposed clock interferometer employs an alkaline-earth-like atom held in an optical trap at the magic wavelength.
  arXiv  Detail & Related papers  (2024-02-22T09:57:07Z)
• Finite Pulse-Time Effects in Long-Baseline Quantum Clock Interferometry [45.73541813564926]
  We study the interplay of the quantum center-of-mass $-$ that can become delocalized $-$ together with the internal clock transitions. We show at the example of a Gaussian laser beam that the proposed quantum-clock interferometers are stable against perturbations from varying optical fields.
  arXiv  Detail & Related papers  (2023-09-25T18:00:03Z)
• Multi-ensemble metrology by programming local rotations with atom movements [3.7291072604053306]
  controlling optical transitions locally remains an outstanding challenge for neutral atom based clocks and quantum computing platforms. We show arbitrary, single-site addressing for an optical transition via sub-wavelength controlled moves of tweezer-trapped atoms. We implement single-shot, dual-quadrature readout of Ramsey interferometry using two atomic ensembles simultaneously.
  arXiv  Detail & Related papers  (2023-03-29T17:55:20Z)
• Direct comparison of two spin squeezed optical clocks below the quantum projection noise limit [0.6376404422444008]
  Building scalable quantum systems that demonstrate genuine enhancement based on entanglement is a major scientific goal. We present a new optical platform integrated with collective strong-coupling cavity QED for quantum non-demolition (QND) measurement.
  arXiv  Detail & Related papers  (2022-11-16T02:22:49Z)
• Universality-of-clock-rates test using atom interferometry with $T^{3}$ scaling [63.08516384181491]
  Atomic clocks generate delocalized quantum clocks. Tests of universality of clock rates (one facet of LPI) to atom interferometry generating delocalized quantum clocks proposed. Results extend our notion of time, detached from classical and localized philosophies.
  arXiv  Detail & Related papers  (2022-04-05T12:26:56Z)
• Superposition of two-mode squeezed states for quantum information processing and quantum sensing [55.41644538483948]
  We investigate superpositions of two-mode squeezed states (TMSSs) TMSSs have potential applications to quantum information processing and quantum sensing.
  arXiv  Detail & Related papers  (2021-02-01T18:09:01Z)
• Measuring gravitational time dilation with delocalized quantum superpositions [0.0]
  We present an interferometry scheme employing group-II-type atoms, such as Sr or Yb, capable of measuring the gravitational time dilation. The scheme relies on very simple atom optics for which high-diffraction efficiencies can be achieved with mild requirements on laser power. Remarkably, the recently commissioned VLBAI facility in Hannover, a 10-meter atomic fountain that can simultaneously operate Yb and Rb atoms, meets all the requirements for a successful experimental implementation.
  arXiv  Detail & Related papers  (2020-10-21T17:23:39Z)
• Equivalence of approaches to relational quantum dynamics in relativistic settings [68.8204255655161]
  We show that the trinity' of relational quantum dynamics holds in relativistic settings per frequency superselection sector. We ascribe the time according to the clock subsystem to a POVM which is covariant with respect to its (quadratic) Hamiltonian.
  arXiv  Detail & Related papers  (2020-07-01T16:12:24Z)
• Feedback-induced instabilities and dynamics in the Jaynes-Cummings model [62.997667081978825]
  We investigate the coherence and steady-state properties of the Jaynes-Cummings model subjected to time-delayed coherent feedback. The introduced feedback qualitatively modifies the dynamical response and steady-state quantum properties of the system.
  arXiv  Detail & Related papers  (2020-06-20T10:07:01Z)
• Atom-interferometric test of the universality of gravitational redshift and free fall [48.82541018696971]
  Light-pulse atom interferometers constitute powerful quantum sensors for inertial forces. We present a specific geometry which together with state transitions leads to a scheme that is sensitive to both violations of the universality of free fall and gravitational redshift.
  arXiv  Detail & Related papers  (2020-01-27T13:35:30Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.